Boomerang reminds me of an old Sabbat pack from a Vampire game I used to be in (for those not familiar with Vampire: The Masquerade, think a paramilitary unit). They were called Flashpoint. They used grenades. They only used grenades.

"Look, the enemy!"

*massive salvo of frag and incendiary grenades*

"I think someone is hiding over there!"

*chuck a grenade in that general direction with 'Auspex' painted on the side*

"We need to vanish!"

*smoke grenade*

/the joke being that they had vampiric powers, but instead of using them, found grenades that sort of had the same effects//silly one-shot gimmick good times